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Finding the Fourth Proportional to 8,719.80, 13,079.64 and 2,876.88

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Solution

The fourth proportional to 8,719.80, 13,079.64 and 2,876.88 is: 4,315.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.80 : 13,079.64 = 2,876.88 : x
  2. Step 2: Convert to fraction form
    8,719.80/13,079.64 = 2,876.88/x
  3. Step 3: Cross multiply
    8,719.80x = 13,079.64 × 2,876.88
  4. Step 4: Simplify right side
    8,719.80x = 37,628,554.72
  5. Step 5: Solve for x
    x = 37,628,554.72/8,719.80
  6. Step 6: Final answer
    x = 4,315.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.